Printing telegraph



June 28, 1932. MacCOY 1,865,264

PRINTING TELEGRAPH Filed Dec. 9, 1929 4 Sheets-Sheet l A. T. M COY June28, 1932.

PRINTI NG TELEGRAPH Filed Dec. 9, 1929 4 SheetsSheer 2 Z?1 9671507aznliewf [7610 Go flifoww g June 28, 1932.. A. T. M coY PRINTINGTELEGRAPH 4 Sheets-Sham.

Filed Dec. 9, 1929 A. T M COY June 28, 1932.

PRI NT I NG TELEGRAPH Filed Dec. 9, .1929 4 Sheets-Shem, 4

az'zom Patented June 28, 1932 QFFECE ANDREW 'I. MACCOY, OF BOSTON,JHASSACHUSETTS PRINTING TELEGRAPH Application filed December 9, 1929.

This invention relates to printing telegraphs and pertains moreespecially to character printing apparati for selectively transmittingand receiving, for example, letter and numeral characters and the like,giving press reports, stock quotations and similar information. Theinvention resides more particularly in, a receiving and printingmechanism, and the primary object thereof is to provide a speedier andsimpler device for this purpose.

Devices of this nature which print on a narrow tape commonly employ oneor more character printing wheels. Means is provided for rotating thiswheel or wheels and heretofore it has been considered necessary toarrest the wheel while performing each printing operation. It is anobject of my invention to provide an improved receiving and printingmechanism wherein the printing operation is performed without stoppingor effecting the rotation of the wheel, the speed of operation therebybeing considerably increased.

Printing telegraphs of his nature commonly employ two type wheels, onecarrying alphabetical type and the other numeral type, and two pressmembers respectively cooperating with the wheels. Frinting from thesewheels requires quick selection and oporation of these members. Afurther object of my invention resides in providing electricallycontrolled means comprising a pair of ser'es and oppositely connectedelectromagnets respectively controlling the members and cooperatingmechanical. means for quickly operating the members to perform theprinting operation.

Among other objects of my invention are the provision of improved meansfor feeding the improved means far automatically controlling thestarting and stopping of the printing mechanism.

Vfith the above and other objects in view, as will become more apparentas the description proceeds, my invention consists in the features ofconstruction and operation set forth in the following specification andillustrated in the accompanying drawings. In such drawings 1' haveillustrated certain spe- $eria1 No. 412,751.

cific embodiments of my invention but it will be understood that theinvention can be otherwise embodied and that the drawings are not to beconstrued as defining or limiting the scope of the invention, the claimsappended hereto being relied upon for that purpose.

Referring to the figures of the drawings:

Figure 1 is a front elevation of my improved printing telegraph.

Fig. 2 is an end elevation thereof.

Fig. 8 is a fragmentary sectional view showing a portion of the drivingconnections.

Fig. 1 is a sectional view taken approximately on line lV-IV of Fig. 2.

Fig. 5 is a rear elevation.

6 is a diagrammatic View particularly showing the wiring circuits.

In the drawings, 1 indicates the base of my improved printer and 2 aroll of tape 3 mounted on a support 4. The end of this tape is led overa bracket 5 and beneath a pair of type wheels 6 and 7, the wheel 6having mostly numeral type and the wheel 7 having mostly letter type. Aresilient stripper 8 supported at 9 extends horizontally above the tapebeneath the wheels and normally holds the tape slightly out of contactwith the wheels. The free end of the strip is gripped midway between itsedges by a pair of knurled feed wheels 10 and 11. An inking roller 12supported on a pivoted arm 13 rests on the type wheels.

The type wheels 6 and 7 and tape feed wheels 10 and 11 are driven by amotor 14 mounted on the base 1. A spiral gear 15 on the motor shaft isin mesh with a spiral gear 16 on a shaft 17.

A pinion 18 on the shaft 17 is in mesh with a gear 19 fast on a shaft20. A gear 21 loose on the shaft is frictionally held between a pair offriction plates 22 and 23, a spring 24 acting to force a collar 25against the plate 22 and hold these parts in frictional contact. Thecollar or disc 25 is pinned at i 26 to rotate with the shaft.

The tape feed wheels 10 and 11 are driven from the gear 21 as follows.The gear 21 is in mesh with a pinion 27 mounted on a stud 27 and thepinion 27 is in mesh with a pinion 28 on a shaft 29. The feed wheel ismounted on the opposite end of this shaft. The feed wheel 11 is mountedon the outer end of a sleeve rotatable on a stud 31 carried by an arm 32pivoted at 88. A gear 34 is carried on the inner end of the sleeve. Thefeed wheel 11 and gear 34 are so located as to respectively engage thecooperating feed wheel 10 and a pinion 35 on the shaft 29 when the armis in its normal position (Fig. 1). A leaf spring 36 aids gravity inholding these elements in proper working contact. The feed wheels aretherefore driven in the tape feeding direction when permitted by thefollowing means.

A ratchet wheel 37 fast on the shaft 29 is normally engaged by a pawl 38carried on a shaft 39. A spring 40 on this shaft normally holds the pawlengaged with the ratch et wheel in a manner preventing rotation of thefeed wheels. Beneath the shaft 39 is a pair of electro-magnets 41 andthe armature 42 thereof is mounted on this shaft. The arrangement issuch that when the magnet is energized the attraction of the armaturewithdraws the pawl and permits the shaft 29 to turn in the tape feedingdirection. The spring 40 however quickly returns the pawl in a mannerpermitting only one tooth of the ratchet to escape. This movement feedsthe tape the proper distance for one printing character thereon.

The gear 19 is in mesh with a gear 43 loose on a shaft 44, the shafts17, 20, 29, 39 and 44 all being supported in a frame comprising frontand rear members 45 and 46. The gear 43 is held frictionally between apair of friction plates 47 and 48. The plate 47 rests against a gear 49fast on the shaft 44 and a spring 50 on the shaft holds a collar 51against the plate 48 in a manner keeping these parts in frictionalcontact. The collar 51 is pinned at 52 to rotate with the shaft. Thetype wheels 6 and 7 which may be made integral as illustrated in Fig. 3,are mounted on the front end of this shaft 44.

Loosely mounted on the shaft 20 beneath the type wheels is a sleeve 53.The front end of this sleeve carries a pair of toothed wheels 54 and 55formed integrally therewith or otherwise fixed thereto. These wheelscooperate with the type wheels in a manner hereinafter described. A gear56 fined to the inner end of the sleeve is in mesh with the gear 49, thetype wheels 6 and 7 and toothed wheels 54 and 55 thereby being inpositive driving connection.

he has been above described, the tape feed wheels 10 and 11 are drivenfrom the motor 14 through the frictional connection at 21 and theirrotation is controlled by m chanism synchronized with the printingoperations. Likewise, the type wheels 6 and 7 are driven from the motor14 through the frictional connection at 43 and their rotation iscontrolled by the following mechanism synchronized with the printingoperations.

An escapement wheel 57 fixed on the inner end of shaft 44 hascooperating therewith an escapement arm 58 secured to the free end of anarmature 59 pivoted at 60 bet veen two pairs 61 and 62 ofelectro-magnets. The two lower magnets 61 are so connected in series ina local. circuit 101, hereinafter described, that both attract thearmature 59 when a current is passed through this circuit. The two uppermagnets 62 are so connected in series in a main circuit 99 hereinafterdescribed, that one attracts and the other repels the armature 59 when acurrent is passed through this circuit. The local circuit 101 throughmagnets 61 and through the bars 61 and magnets 62 serve to attract thearmature 59 and h old it in whichever position it occupies, untilarmature is effected by a current through the circuit 99. Thepolarization of the current through the circuit 99 is alternated. ashereinafter described, and the armature is pivoted one way and then theother by the magnets 62 at each polarization change in this circuit.

The escapement wheel 57 has fifteen teeth and the type wheels 6 and 7each has thirty printing characters thereon. At each pulsation or changeof polarity in the main circuit 99 through the magnets 62 the escapementpermits the escapement wheel and its shaft 44 to turn one-thirtieth of afull rotation, thus bringing the next character into printing position.The rotation of the type wheels is therefore synchronzied with thepulsations or polarity changes in this main circuit.

The following means also synchronized with the rotation of the typewheels and the pulsations the main circuit 99 are provided forautomatically and selectively performing the printing operations fromthe type on the wheels as such type pass the printing position.Respectively cooperating with the two type wheels are two press memberspivoted respectively to the free ends 64 of two armatures 65 pivoted at66. The free end 67 of each member 63 engages beneath the tape 8 and isshaped to raise the tape int-o printing engagement with the type by ahammer blow action. This action is provided by th two wheels 54 and 55.Each of these wheels has thirty teeth 68 corresponding to the thirtytype on each type wheel. Each member 63 carries a finger 69 normallydrawn into the path of the teeth 68 by means of a spring 70. A hisengagement is very slight and is limited by adjustable stops 71. T hedownward pivotal movement of each press member is also limited by a pinstop 7 2.

Thetwo arniatures 65 cooperate with four electro-magnets 73 and 74. Thebottom pair 73 is so connected in series in the local circuit 101 thatboth attract the two armatures 65 when a current is passed through thiscircuit. The top pair 7 4 is so connected in series in a main circuit90, hereinafter described, that one attracts its armature and the otherrepels its armature 65 when a current is passed through this circuit.Each armature 65 cooperates with two magnets 73 and 74 and when themachine is operating the local circuit 101 to the magnets 7 3 remainsclosed. These magnets, in cooperation with bars 73 and magnets 74, serveto attract both armatures 65 and hold the fingers 69 out of contact withthe teeth 68 when no current is passing through the circuit 90. When acurrent of one polarity passes through the circuit 90 and magnets 7 4one of these magnets will augment the action of its adjacent magnet 73to more securely hold its armature 65 while the other magnet 7 4, beingoppositely connected in the circuit, will repel its armature 65 in amanner throwing its finger 69 into the path of the teeth 68. The typewheels and toothed wheels 54 and 55 being in constant rotation, a tooth68 will engage the finger and quickly swing the member 63 to press thetape against the corresponding character on the type wheel. The armatureis thereafter immediately retracted by the magnets. It will therefore beseen that electrical impulses of one polarity on the main circuit 90will cause printing from one type wheel and impulses of the oppositepolarity will cause printing from the other type wheel.

In Fig. 6 of the drawings, I have diagrammatically illustrated atransmitting mechanism cooperating with the printer comprising myinvention. It should be understood that this transmitting mechanism isshown in its simplest form for illustrative purposes only. Commercialtransmitting mechanisms of various types and operating on variousprinciples are old and well known in the art and, obviously, any of suchmechanisms can be applied to and used with my invention.

In Fig. 6 is illustrated a double-keyboard 75 comprising an innercontact member 76 and an outer contact member 77. A lead wire 7 8connected to the contact member 76 passes through a battery 79 and fromthence is grounded at 80. A lead wire 81 connected to the contact member77 passes through a battery 82 and from thence is grounded at 80. Itwill be noted that the batteries 7 9 and 82 have their poles oppositelyarranged whereby current passing through one such battery will be ofopposite polarity from current passing through the other battery. Thirtydoubleended keys 83 are mounted on the keyboard and these keys arerespectively connected by wires 84 to thirty contact segments 85 on amember 86. These keys are normally out of contact with the members 76and 7 7 but may be depressed into contact with either of such members.The outer ends of the keys represent the letter characters correspondingto the type Wheel 7 and the inner ends of the keys represent the numeralcharacters corresponding to the type Wheel 6.

Mounted on a shaft 87 and cooperating with the member 86 is a trailer 88adapted to contact with the segments 85 as the shaft ro-' tates. Abrush89 engages the shaft and is connected to the main circuit 90. Alsocarried on the shaft 87 is a distributor wheel 91 having insulatedsegments 92. The edge portion of this wheel is trailed by a pair ofcurrentreversing brushes 93 and 94 so arranged that one brush is alwayson a segment 92 while the other brush engages the wheel. The circuitfrom brush 93 passes through a battery 95 and from thence is grounded at96. The circuit from brush 94 passes through a battery 97 and is thengrounded at 96. It will be noted that these batteries have their polesoppositely arranged whereby current passing through one of the batterieswill be of opposite polarity from current passing through the otherbattery. A brush 98 is in continuous contact with the wheel 91 and isconnected to the main circuit 90 through a hand switch 100. It will beunderstood that the shaft 87 can be rotated by any convenient source ofpower.

The main circuit 90 is always open except when a key 83 is depressed andcontact made through the corresponding segment 85 and brush 88. The maincircuit 99 is always closed except when the switch 100 is open. Incommercial practice several printers are operated from a singletransmitter. Each of these printers includes a local circuit 101, withinwhich is a battery 102, extending through the local magnets 61 and 73,and a local circuit 103 for the motor and within which is a battery 104.It is desirable that these circuits should be closed only when receivingfrom the transmitter. The following means is provided for automaticallyclosing these local circuits when closing the trans mitter switch 100and for automatically opening the circuits when opening the switch 100.

A switch 105 in the local circuit 101 has a stationary contact 106 and acooperating contact 107 on a lever 108 pivoted to the free 32.

end of an armature 109 pivoted at 110. A spring 111 connected to thelever normally holds the lever in a position wherein a shoulder 112thereon engages against a stop pin 113. In such position the free end ofthe lever projects into the path of a lug 114 on the gear 49 and the lugis adapted to engage the lever and open the switch as shown in Figs. 4and 6. However, when the hand switch 100 is closed a pair ofelectro-magnets 115 in the circuit 99 attracts the armature 109 and withdraws the lever from the path of lug 114 and the spring 111 thereuponcloses the switch. The switch 105 remains thus closed as long as theswitch 100 is closed and is automatically opened when the switch 100 isopened. The spring 111 is not strong enough to pull the armature 109away from the magnets 115 even though the current through the magnets isof a pulsating nature;

The circuit 103 includes a normally open switch 116. The local circuit101 includes a pair of electro-magnet-s 117 having an armature 118adapted to engage and close the switch 116 when the switch 105 isclosed. Both local circuits 101 and 103 are therefore automaticallycontrolled by the hand switch 100. The main circuits 90 and 99, afterpassing through their several electroqnagnets, are grounded at 119 and120.

The operation of my improved mechanism, as illustrated herein, issubstantially as follows: It is assumed that one or more receivingprinters are connected to the transmitter through main circuits 90 and99 as illustrated in 6 and that, switch 100 being open, the circuits areall open. When d siring to transmit, the transmittim operator closes theswitch 100. A current is immediately transmitted through the circuit 99from one brush 93 or Qlandthis current excites the magnets 115 andwithdraws the lever 108 from the lug 114. The spring 111 thereuponimmediately closes the switch 105 of the local circuit 101. This circuit101 thereupon (1) excites magnets 61 to hold the escapeinent 58 againstoperation, excites magnets 3 to withdraw and hold the fingers 69 fromthe teeth 68, and (3) excites magnets 117 to close the motor circuitswitch 116. The operator then starts the rotation of shaft 87, the distributor wheel 91 and brushes 93 and 9% thereupon causing change ofpolarity pills;- tions through the circuit 99. p I

All the circuits, except circuit 90, now being closed, the followingoperations are taling place. The motor is driving the gear 19 andtending to rotate the feed wheels 10 and 11 through the frictionalconnection at 2'1 and tending to rotate the type wheels and 7 throughthe frictional connection at 13. The pulsating current passing throughcircuit 99 is oscillating the es'capemc'nt arm 58 to rotatethe typewheels and toothed wheels 54 and 55 in synchronisni with the rotation ofshaft 87. The speed of the motor is such that the gear 13 is rotatedslightly faster than the gear 49. The pawl 38 is holding the tape feedwheels from rotating. The local magnets 73 are holding the press memb is03 from the toothed wheels and 55, and magnets 115 and 117 are operatingto keep switches 105 and 116 closed.

The operator may now transmit any of the characters on the keyboardmerely by depressing the corresponding keys 88. For example, to transmitand print character A, the operator depresses the key end marked A intocontact with the member 7 7 and holds the same depressed until the brush88- con tactswith the segment 85 connected thereto.

7e, wire 90, brush 89, shaft 87, trailer 88,

segment 85, wire 84, key A. The polarity of this circuit through thebattery 82 is such that it causes the press magnet 74 of the numeraltype wheel 6 to attract its armature 65. Both magnets 78 and 74therefore cooperate to hold the front press member 63 from engaging theteeth of the wheel 54. The rear magnet 74 however, being oppositelyconnected in the circuit, repels its armature 05 in a manner throwingthe finger 69 of its press member 63 into contact with a tooth of thewheel In like manner, all contacts made with member 77 pass throughbattery 82 and cause printing from the letter type wheel 7. All contactsmade with member 76 pass through battery 79, having its poles oppositelyarranged, and cause printing from the numeral type wheel 6.

It will be understood that the distributor wheel 91 and the trailer 88being mounted on shaft 87 assures the accurate synchronizing of the typewheels with the shaft 87 i. e., the type which is in printing positionalways corresponds to the character connected with the segment engagedby the trailer 88, It'will also be understood that the teeth 68 socorrespond with the type that a tooth is always in proper position toengage the finger 69 and kick the press member and tape into printingcontact with the character selected; The impulse through the circuit 90also causes the magnets 11 to withdraw the pawl 42 and permit the feedwheels 10 and 11 to feed the tape the distance of one character;

The magnets 74 and teeth 68 act together in such manner that the tapefeeding and printing operations take place substantially simultaneously.I

It is believed that the operation of the invention will be clear fromthe above description taken in connection with thedrawings.

The closing of the switch by the transmitting operator automatic-allycloses the circuits in all the receiving instruments on the line; Uponstarting of the shaft 87,- the type wheels are immediately rotated andcontinue to rotate during the entire transmitting period, the printingand tape feeding operations taking place so rapidly and synchronouslytherewith that no stopping or effecting of the type wheels isneeessary'. It is well known that the stopping and restarting of theprinting wheel for each printing operation, as heretofore commonlypracticed, consumes alarge portion of the total operating time. Myinvention entirely eliminates these objections and obviously increasesthe printing capacity to a very considerable extent. As thus farexperimental: ly developed, my invention herein illustrated hassuccessfully operated to print 9000 characters per minute, i. e., whenthe circuit 90 is held closed and all characters on the wheel areprinted. This requires the type wheels to make 300 rotations per minute,and is the speed at which I have normally operated the machine. At thisspeed, the apparatus will normally operate to selectively printapproximately 900 characters or approximately 150 words per minute. Whenthe transmitting operation is completed, the operator needs only to openthe switch 100 and the circuits in all the receiving instruments on theline immediately open automatically.

I claim:

1. In a printing telegraph, the combination of a character printingwheel, means including controlling means for continuously rotating thewheel at a definite speed, a. member adapted to press a tape against thewheel to selectively print the characters thereof on the tape duringsuch rotation, means synchronized with the controlling means andincluding mechanically driven means for causing instantaneous operationof the said member to print predetermined and selected characterswithout stopping the wheel, and synchronized means for auto- I maticallyfeeding the tape at such printing operations.

2. In a printing telegraph, the combination of a character printingwheel, means including an electro-magnetically operated escapement forcontinuously rotating the wheel at a definite speed, a press member,continuously operating means adapted to selectively move the member topress a tape against the wheel and cause printing of selected charactersthereon during such rotation, means including electro-magnetic meanssynchronized with the escapement for causing the press member to be thusoperated to print predetermined and selected characters without stoppingthe wheel, and synchronized means for automatically feeding the tape atsuch printing operations.

8. In a printing telegraph, the combination of a character printingwheel, means including controlling means for continuously rotating thewheel at a definite speed, a member adapted to press a tape against thewheel to selectively print the characters thereof on the tape duringsuch rotation, a member driven synchronously with the printing wheel,means cooperating with the first member and adapted to engage the secondmember to cause a printing operation, means synchronized with the saidcontrolling means for causing such engagement to print predetermined andselected characters without stopping the wheel, and synchronized meansfor automatically feeding the tape at such printing operations.

4:. In a printing telegraph, the combination of a character printingwheel, means ineluding electrically controlled means for ro tating thewheel at a definite speed, a press member, mechanically driven meansadapted when engaged by the press member to move the member intoprinting contact with the wheel, means including electrically controlledmeans in synchronism with the first named electrically controlled meansfor causing the press member to selectively enthe mechanically drivenmeans and print predetermined and selected characters from the wheel,and synchronized means for automatically feeding the tape at suchprinting operations.

5. In a printing telegraph, the combination of a character printingwheel, a wheel having positive driving connection there with andprovided with teeth respectively corresponding with the characters onthe wheel, means including controlling means for continuously rotatingthe wheels at a definite speed, a member adapted to press a tape againstthe printing wheel to selectively print the characters thereof on thetape during such rotation, means cooperating with and causing printingoperation by said member when moved into the path of said teeth, meanssynchronized with said controlling means for causing the secondmentioned means to be engaged by predetermined teeth and thereby printpredetermined characters, and synchronized means for automaticallyfeeding the tape at such printing operations.

6. In a printing telegraph, the combination of a character printingwheel, a motor for rotating the wheel, an electric circuit, means in thecircuit controlling the rotation of the wheel, an electric circuitsynchronized with the first named circuit, means operative to print on atape from said wheel, electromagnetic means in the second named circuit,and means operated by the last named means for selectively controllingthe operation of the second named means.

7. In a printing telegraph, the combination of a character printingwheel, means for rotating the wheel, an electric circuit, means in thecircuit controlling the rotation of the wheel, anelectriccircuitsynchronized with the first named circuit,electro-magnetic means in the second named circuit, an armaturecooperating therewith, means pivoted to the armature, and a drivenmember adapted to kick the pivoted means into printing contact with acharacter on the wheel when permitted by the electro-magnetic means toengage the member.

8. In a printing telegraph, the combination f two character printingwheels, means for rotating the wheels, an electric circuit, means in thecircuit controlling the rotation of the wheels, an electric circuitsynchronized with the first named circuit, two electro-magnetsoppositely connected in the second named circuit, two armaturesrespectively cooperating therewith, two members respectively pivoted tothearinatures, and driven means adapted to kick the members intoprinting contact with the characters on the wheels, the operativeengagement of the members with the said drive/h m being C nt oll d hrthe el. r0- magnets. Y V v 9. In a printin telegraph, the combination oftwo character printing wheels, a pair of press m'emhers respectivelycooperating therewith, a pair of series and oppositely connectedelectro-magnets respectively controllingjsaid members, the arrangementbeing such that currents of opposite polarity will v orro e fiec s s e vly Qn ther es' mb mea hc hhnef he toi e netically operated escapementfor continur ht e' th hee a a efin te r e means syi' chronizing theoperation of the t h d el hhf z eghet w t the e cape ment, and; meansfor moving the selected p hs m lh tte Pre a e e ea nst the Q9- l hhe mCh -teete Oh. e flit ,1; Selee ed, the r ngement e n suchtha hepo h hrof the circuit through the said magnets automaticallyselectsthe wheeland thecurrent impulse selected determines the character printed,

1, lht htiee e eraph, he c mbine tionj of a character printing wheel, amotor i s one h't enhe ed t ne ete' h whee an 'o h en l y cont led.escanem n on ng e ietah ief t w e l me n for r ee ih e ami e pri t ng onac hhhe h l, e s es e dinge e 9rmag netie means synchronized withtheescape In entfo r causing the first named"; means to press the tapeagainst the eel-responding charaeter on the wheel while the :wheelcontinues to rotate, and, other synchronized,

' e h ehte hi c ll' eed n i he tape a such printing operations.

1 1 In ja print in g telegraph, the cemhina; tion of a printing wheelhaving'a plurality of,character s thereon, a motor frictionallyconnected to rotate the wheel, and an electromagnetically controlledescapement so controlling the rotation o ftlie wheel that the charactersthereon are consecutively brought into printing position synchronouslywith thepulsationsor polarity changesin the circuit th rough the electro-m a gnet.

1 2. In a controlhng mechanism, the comhlnat on oftwo electro-lnagnetsconnected in series and in the s'ai ne direction, twocooperating andadjacent"electro-magnets connected in series hut in opposite directions,and-two armatures therefor, one armature cooperating withone of thefirst named magnets and one of the second named magnets and the otherarmature cooperating with the remain gv wo gm s,

In controlling mechanism, the combination "of two electro-magnetsconnected in series and inthe same direction, two cooper leea ee' atingand adjacent electro-magnets' connected;

in series but in opposite directions, and two pivoted armatures thereforhaving their pivots more closely adjacent the two first named; magnets,one armature cooperating with one of the first named magnets and one ofthe second named magnets and the other arma; ture cooperating with theremaining two magnets.

1ft. In a printing telegraph, the combinahiQh, Oi? W h ter p i t ng heelPa r of; press members respectively cooperating therewith, and a pair ofseries and, oppositely connected electro -l'nagnets respectivelycontrolling said memhers, the arrangement being such that currents ofopposite polarity will have oppositeefiects respectively on the pressmembers.

15. In a printing telegraph, the combina tion of two character, printingwheels, a pair, of Pre s m mb re p ct ve y w n-a hile therewith, a pairof series and oppositely. connected clectro1nagnet s respectively controlling said members, and another pair. of; series and like connectedelectro-magnets re pe t ly Ope t n. ai member he arrangement being suchthat a local circuit, ew-s h eco d rah mhg ts W ll at; tract both press,members and currents of; opposite polarity through the first, ofv netswill a e ppo te fec s, eam.- tively, on the press members,

1 6, In a printing telegraph, the comhina tion of a character printingwheel, means i n eluding amotor for rotating thewheel at, a,definitespeed, a main circuit, a local circuit, a local circuit for the.motor, means including electrical means in the first, namedloeal circuitand synchronized with the main, cir cuit andthe rotation of-the wheelfor caus ing selective printing from the wheel, means in, themaincircuit for causing the first, local circuit to close when the maincircuit is closed I and to open when the main circuitjs, opened, andmeans in the first local'circuit'fqr (3on trolling the motor circuit.

17 In a printing telegraph, the combination of a characterprintingwheel, a motor, for rotating the wheel, a' main circuit, a localcircuit, an electrically controlled escapement, in both said circuitsfor controlling the ret ation of the wheel, a local circuit for the me}tor, means including lectrQanagnetic means, in the main circuit forcausing the first named local circuit to close when the main circuitisclosed and to open when the maincircuit is opened, and 'electro-magneticmeans the, firstnamed local circuit for controlling ,the motorlcircuit.

18. In a printing telegraph, the combina; tion of a'character'prinit'ng'wheel, a motor forrotating the wheel, aiin'ai'n. circuit, a.local: circuit, electro magneticl. means in, both .said circuits forcontrolling the rotation of the wheel, a local circuitfforthemotor, anor inally closed switch in the first named local circuit, mechanicalmeans driven by the motor for opening the switch and holding it open,means including electromagnetic means in the main circuit forwithdrawing the switch beyond the path of said mechanical engagementwhen the main circuit is closed and into said path when the main circuitis opened, and electro-magnetic means in the first local circuit forcontrolling the motor circuit.

19. In a printing telegraph, the combina tion of a character printingwheel, a motor for rotating the wheel, a frictional driving connectionbetween the motor and the wheel, a main circuit, a local circuit for themotor, electrically controiled means in the main circuit for controllingthe rotation of the wheel, a second main circuit synchronized with thefirst main circuit, means including electrical means in the second maincircuit for causing selective printing from the wheel, and means forcausing the motor circuit to close when the first main circuit is closedand to open when the first main circuit is opened.

In testimony whereof I afliX my signature.

ANDREW T. MAGCOY.

